Comments | sandyra_kay: (без темы)

sandyra_kay

(Untitled)

Feb 08, 2007 15:42

I am supposed to take the ACT test in less than two days. Saturday morning, 8 am ( Read more... )

Comments 4

gauriel February 9 2007, 04:53:53 UTC

Okay, what that is is that they've factored the square root of 48. Because the square root of 48 isn't a whole number, this is what they've done:

48 = 16 x 3

therefore sqrt48 = sqrt16 x sqrt3

the root of 16 is 4, so that means:

sqrt 48 = 4 x sqrt3

I hope this makes sense! *smooches*

gauriel February 9 2007, 04:56:25 UTC

Oops, just reread your thing, and I missed the negative part. Hmm. You're right, the answer needs a negative in there somewhere. I should know this stuff, now I'm feeling stupid.... :P

It does work, actually. wonder_wombat February 15 2007, 02:43:19 UTC

Because you forgot that when a negative number is squared it becomes positive. All squares are positive. So it works out the same way. Negative is negligible.

Re: It does work, actually. sandyra_kay February 15 2007, 04:58:10 UTC

Joo hush, young wombat, I don't wanna hear it from a middleschooler. ;-)